Illuminating vault-cover.



PATENTED APR. 26, 1904.

J. T. HARROP.

ILLUMINATING VAULT COVER.

APPLICATION FILED DBO. 8, 1903.

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PATENTBD APR. 26, 1904;

J. T. HARROP.

ILLUMINATING VAULT COVER.

APPLICATION FILED D30. 8, 1903.

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.4 TTORNEYS UNITED STATES Patented April 526, 1904.

PATENT OFFICE;

JOHN T. HARROP, or GARFIELD, NEW JERSEY- I i ILLUMINATING VAULT-COVER.

SPECIFICATION forming part of Letters Patent No. 758,443, dated Apri126, 1904. Application filed December 8, 1903. Serial No. 184,266. (Nomodel.)

zen of the-United States, residing at Gran field, in the county ofBergen and State of New J ersey, have invented certain new and.

useful Improvements in Illuminating Vault-- Covers, Floorings, andRoofings, of which the following is' a specification, such as willenable those skilled in the art to which it appertains to make and usethe same.

This invention relates to illuminating vaultcovers, floorings, roofings,and other structures of this class; and the object thereof is to providea vault-cover, flooring, or roofing of the class specified which isstrong and durable and comparatively inexpensive and which possesses amaximum power for the transmission of light; and the invention con.

sists in a novel form oftransparent or trans lucent lens or bulls-eyeset into a cement frameor support in the manner hereinafter describedand claimed and also in the trans parent or translucent lens orbulls-eye constructed as hereinafter described and claimed The inventionis fully disclosed in the fol-' lowing specification, of which theaccompanying drawings form a part, in which the sepa rate parts of mimprovement are designated by suitable reference characters in each ofthe views, and in which t Figure 1 is a plan view, partially in section,of vault-cover or the like made according to my invention; Fig. 2, apartial section thereof on the line 2 2; Fig. 3, a side'view ofa lens orbulls-eye which I employ; Fig. 4, a transverse vertical section thereof,and Fig. 5 a sectional view showing the method of constructing a vaultor other light according to my invention.

In the practice of my invention I provide a transparent or translucentlens or bulls-eye a, the body portion of which is cylindrical in Igeneral form, but provided with longitudinal grooves a four of which areshown and the depth or length of which is preferably about a quartergreater than itstransverse diameter. The bulls-eye a is providedtransversely of the grooves c with projections or ribs a a, and (5,arranged one above another, and the ribs are arranged in separatehorizontal planes,

the bottom rib'sla being preferably flat on their under sides, as shownat a The ribs (0 a, and a as hereinbefore stated, are arrangedtransversely of the groove portlons a of the bulls-eye, and betweenthese ribs the bulls-eye is provided with vertically-arranged ribs orprojections (0 which correspond with the grooves a and which are notcrossed, by the ribs or projections a a, and aE-and said ribs orprojections are deeper than said grooves. The bulls-eyes a, any desirednumberof which may be employed, are alsopreferably slightly greater indiameter or dimensions at Y the top than at the bottom, and the ribs orprojections a a, and a? serve to hold the said bulls-eyes securely in abedding of cement or similarmaterial in whichthey are placed.

In the forming the vault or other light I provide a suitable box orframe 6, which is placed on suitable supports 0, and betweenthesesupports, at the top thereof, is placed a board or other supportcl, which is held in proper position by a suitable frame or support CZ.Over the board or-support d is placed a piece of cardboard e or otherthin material, and this cardboard or other thin material isprovided atregular intervals and according to the position in which it is desiredto place the bullseyes in the vault or other light with openings 6adapted to receive the lower end of the bulls-eyes, and said bulls-eyesare positioned by inserting the lower end thereof in-' the openings 6and the ribs 0& rest on the cardrial. Figs. 1 and 5 show the method ofarranging the bulls-eyes in the frame I), and the sheet 6 serves to holdthe bulls-eyes in proper position during the process of packing saidbulls-eyes in a bedwork of cement, which is shown at f. When thebulls-eyes have been properly positioned, I place a layer of cement inthe box I), which is packed around the bullseyes and over which isplaced a plurality of metal rods 9. Anotherlayer of cement is placed inposition, and other rods h are placed thereon, and the cement is placedover the rods 7t and filled in around the bullseyes up to and flush withthe tops thereof, as clearly shown in Fig. 5. After the cement becomesset or hard the vault or other light thus formed is removed from theframe I), and the sheet 0 is torn off or removed, and the space occupiedby said sheet is filled with ordinary plaster, as shown ate in Fig. 2.

It will be understood that the rods 9 and la reinforce and make strongerthe bedwork of cement, which constitutes the body of the light, or ofthe framework in which the bullseyes are placed, and these rods may beemployed in any desired manner, or any suitable metal centering may besubstituted therefor. The bulls-eyes a are also preferably provided inthe bottom thereof each with a recess a which extends upwardly thereintoabout three-quarters of the vertical height thereof, and these recessesaid the refractory powers of the bulls-eyes while not reducing thestrength thereof to any extent, and the ribs 00, a, and a also modify toan extent the action of the bulls-eyes in the transmission of the lighttherethrough.

In practice Iprefer to arrange the lenses or bulls-eyes a in the cementbed, so that the ribs a a, and a of one of said lenses or bullseyes willextend in the direction of one of the vertical ribs in the adjacentbulls-eyes or lenses in rows that are arranged transversely and inopposite directions, as shown in Fig. 1; but their positioning of thebulls-eyes in the cement bed or frame is not an .essential feature ofthis invention.

This improvement may bemade in the form of panels to be set in anysuitable frames, or it may be employed in connection with any suitableframes or supports, all that is necessary being that a bottom, base, orsupport be provided on which are placed the lenses or bulls-eyes, saidbottom serving as a support for the cement while the latter is becominghard or set, and it will also be apparent that any suitable cement,concrete, or similar material may be employed as a bed or holder for thelenses or bulls-eyes.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. lna vault or similar light, a lens or bullseye, which issubstantially cylindrical in form and the outer surface of which isprovided in the opposite sides thereof with vertically-arranged groovesforming corresponding ribs,

and short transverse ribs arranged in horizontal planes and crossingsaid grooves, said transverse ribs being deeper than said grooves,substantially as shown and described.

2. In a vault or similar light, a lens or bullseye, which issubstantially cylindrical in form and the outer surface of which isprovided in the opposite sides thereof with vertically-arranged groovesforming corresponding ribs, and short transverse ribs arranged inhorizontal planes and crossing said grooves, said transverse ribs beingdeeper than said grooves, and the bottom transverse ribs being flat ontheir under sides, substantially as shown and described.

3. In a vault or similar light, a lens or bullseye, which issubstantially cylindricalin form and the outer surface of which isprovided in the opposite sides thereof with vertically-arranged groovesforming corresponding ribs, and short transverse ribs arranged inhorizontal planes and crossing said grooves, said transverse ribs beingdeeper than said grooves, and the bottom transverse ribs being fiat ontheir under sides, said lens or bulls-eye being provided in the bottomstheieof with recesses which extend upwardly, substantially as shown anddescribed;

4. A vault or similar light, comprising a plurality of lenses orbulls-eyes set into a bed or support of cement reinforced with metal,said lenses or bulls-eyes being approximately cylindrical in form andbeing of a depth greater than their transverse diameters, said lenses orbulls-eyes being also provided in the opposite sides thereof-withvertically-arranged grooves and short transverse ribs arranged inhorizontal planes and crossing said grooves, and of greater width thanthe depth of said grooves, the bottom transverse ribs being fiat ontheir under sides, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of the subscribing witnesses, this 4th day ofDecember, 1903.

JOHN T. HARROP.

Witnesses:

F. A. STEWART, (J. E. MULREANY.

